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Let It Be

The producers of this dead-of-summer moneymaker, a cover-band tribute to the Beatles that has been playing in London since last fall, are being sued for copyright infringement by the producers of “Rain,” another Beatles tribute, which ran on Broadway in 2010 and 2011. Although the shows share a concept, many design elements (trippy projections, vintage newsreel footage during scene changes), and several cast members, neither is the pinnacle of originality. The formula: take four personable guys who can do Liverpool accents, slap them in mop-top wigs and Sgt. Pepper suits, and churn out the hits, from “She Loves You” to “Here Comes the Sun.” The result: boomers and their children singing along and swaying happily, as if catnip had been released from the rafters.